Elsevier

Nuclear Physics A

Volume 969, January 2018, Pages 226-236
Nuclear Physics A

Transitions between symmetric and asymmetric modes in the region of heavy actinides

https://doi.org/10.1016/j.nuclphysa.2017.10.001Get rights and content

Abstract

Using the improved scission-point model, the mass and charge distributions of fragments resulting from the fission of californium, fermium, and nobelium isotopes are calculated and compared with the available experimental data. For the fissioning Fm and No nuclei, the transitions from a two-peaked to a single-peaked mass distributions are predicted. The transition between asymmetric and symmetric fission modes with the variation of neutron number is shown to be related to the change of the potential energy surface at scission point.

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Acknowledgements

This work was supported in part by DFG–RFBR (contract Le439/6-1). The Romania–JINR (Dubna), IN2P3 (France)–JINR (Dubna), and Polish–JINR (Dubna) Cooperation Programmes are gratefully acknowledged. The work of N.V.A. was partly supported by Tomsk Polytechnic University Competitiveness Enhancement Program grant.

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